Romulus Michigan Climate Data

Monthly Average Climate Data for Romulus Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.9 °F32.3 °F2.39 in.
February18.9 °F35.3 °F2.06 in.
March27.0 °F45.7 °F2.46 in.
April37.5 °F58.7 °F3.15 in.
May48.7 °F70.7 °F3.68 in.
June58.5 °F80.0 °F3.38 in.
July62.5 °F84.1 °F3.26 in.
August61.0 °F82.1 °F3.33 in.
September53.5 °F75.6 °F3.14 in.
October42.2 °F62.7 °F2.86 in.
November32.3 °F49.1 °F2.63 in.
December24.2 °F37.5 °F2.34 in.
Annual40.4 °F59.5 °F34.68 in.

Climate Data for Romulus Michigan

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation